Thread: "If" statement not working

Hi. I have an if statement that checks if a string matches the title of a radiobutton. If it does, it sets the radiobutton's selectedValue to true. If not, it disregards the string and puts it into a textbox. The problem is, the if statement simply doesn't work. I've checked what the value of the String is, and it matches what the if statement should pick up.

I've included a ZIP archive with my source code and a runnable JAR. Can anyone tell me why the if statement doesn't pick up? Thanks.

The if statement is in edit.java, in the setup() sub. I have it so the textbox displays what the variable is. Don't worry about the textbox, I can program that fine, I just need to get the if statement to set the radioButton values.

Thanks!

src.zip

an if statement that checks if a string matches the title of a radiobutton

Are you using the equals method to compare the contents of two Strings?

If would be better if you posted the code here so we could see the statement that is the problem.

 public static void setup(){	String message;	String colour;	String movement;	String original;	String temp = new String();	int count;	boolean colourbool = false;	boolean movementbool = false;  	original = main.list1.getItem(main.list1.getSelectedIndex());      	count = original.indexOf(":");	temp = original.substring(0, count);	txtText.setText(temp);	if(temp == "Red"){	rdbtnRed.setSelected(true);	}else if(temp == "White"){	rdbtnWhite.setSelected(true);	}else if(temp == "Green"){	rdbtnGreen.setSelected(true);	}else if(temp == "Purple"){	rdbtnPurple.setSelected(true);	}else if(temp == "Cyan"){	rdbtnCyan.setSelected(true);	}else if(temp == "Flash1"){	rdbtnFlash1.setSelected(true);	}else if(temp == "Flash2"){	rdbtnFlash2.setSelected(true);	}else if(temp == "Flash3"){	rdbtnFlash3.setSelected(true);	}else if(temp == "Glow1"){	rdbtnGlow1.setSelected(true);	}else if(temp == "Glow2"){	rdbtnGlow2.setSelected(true);	}else if(temp == "Glow3"){	rdbtnGlow3.setSelected(true);	}else if(temp == "Wave"){	rdbtnWave.setSelected(true);	}else if(temp == "Wave2"){	rdbtnWave2.setSelected(true);	}else if(temp == "Scroll"){	rdbtnScroll.setSelected(true);	}else if(temp == "Shake"){	rdbtnShake.setSelected(true);	}else if(temp == "Slide"){	rdbtnSlide.setSelected(true);	}else{	JOptionPane.showMessageDialog(null, "Didnt do anytin (like normal)");	}  	if(temp == "Wave"){	rdbtnWave.setSelected(true);	}else if(temp == "Wave2"){	rdbtnWave2.setSelected(true);	}else if(temp == "Scroll"){	rdbtnScroll.setSelected(true);	}else if(temp == "Shake"){	rdbtnShake.setSelected(true);	}else if(temp == "Slide"){	rdbtnSlide.setSelected(true);	}    	}

The problem is, it always runs else, like it doesn't equal the temp variable string.
But, it says in the textbox that "temp" equals what i have in the "if" statement, and should be caught in the if statement.

Sorry if its hard to understand

You need to use the equals() method when comparing the contents of String objects. The == operator tests if the two variables refer to the same object.

so, like this?:

if(temp.equals("Red") == true){

}

The '== true' is redundant. The equals method returns a boolean.
if(temp.equals("Red")) {

Okay, thank you. That seemed to work. I didn't notice it because the RadioButtons don't change value for some reason. Thanks for your help though!!!

Would the Radiobuttons not changing have anything to do with being declared as Static? They are. Here is my entire edit class:

import java.awt.BorderLayout; import java.awt.Color; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent;   import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import javax.swing.border.TitledBorder; import javax.swing.ButtonGroup; import javax.swing.GroupLayout; import javax.swing.GroupLayout.Alignment; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JTextField; import javax.swing.JRadioButton; import javax.swing.LayoutStyle.ComponentPlacement; import javax.swing.JButton; import javax.swing.UIManager;     public class edit extends JFrame {  	private JPanel contentPane;	public static JTextField txtText = new JTextField(); static JRadioButton rdbtnNone = new JRadioButton("None");	static JRadioButton rdbtnRed = new JRadioButton("Red");	static JRadioButton rdbtnNone2 = new JRadioButton("None");	static JRadioButton rdbtnScroll = new JRadioButton("Scroll");	static JRadioButton rdbtnWave = new JRadioButton("Wave");	static JRadioButton rdbtnWave2 = new JRadioButton("Wave 2");	static JRadioButton rdbtnShake = new JRadioButton("Shake");	static JRadioButton rdbtnSlide = new JRadioButton("Slide");	static JRadioButton rdbtnWhite = new JRadioButton("White");	static JRadioButton rdbtnGreen = new JRadioButton("Green");	static JRadioButton rdbtnPurple = new JRadioButton("Purple");	static JRadioButton rdbtnCyan = new JRadioButton("Cyan");	static JRadioButton rdbtnFlash1 = new JRadioButton("Flash 1");	static JRadioButton rdbtnFlash2 = new JRadioButton("Flash 2");	static JRadioButton rdbtnFlash3 = new JRadioButton("Flash 3");	static JRadioButton rdbtnGlow1 = new JRadioButton("Glow 1");	static JRadioButton rdbtnGlow2 = new JRadioButton("Glow 2");	static JRadioButton rdbtnGlow3 = new JRadioButton("Glow 3");  	static JButton btnCancel = new JButton("Cancel");	/** * Launch the application. */	public static void main(String[] args) {	EventQueue.invokeLater(new Runnable() {	public void run() {	try {	edit frame = new edit();	frame.setVisible(true);	} catch (Exception e) {	e.printStackTrace();	}	}	});	setup();	}  	/** * Create the frame. */	public edit() {	addWindowListener(new WindowAdapter() {	@Override	public void windowClosing(WindowEvent arg0) {	main.frmRunescapeAutotyper.setVisible(true);	}	});	setTitle("Edit Message");	setResizable(false);	setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);	setBounds(100, 100, 451, 244);	contentPane = new JPanel();	contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));	setContentPane(contentPane);    	btnCancel.addActionListener(new ActionListener() {	public void actionPerformed(ActionEvent arg0) {	dispose();	main.frmRunescapeAutotyper.setVisible(true);	}	});  	txtText.setColumns(10);  	JLabel lblMessage = new JLabel("Message:");  	JPanel panel = new JPanel();	panel.setBorder(new TitledBorder(UIManager.getBorder("TitledBorder.border"), "Colour:", TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 0)));  	JPanel panel_1 = new JPanel();	panel_1.setBorder(new TitledBorder(null, "Movement:", TitledBorder.LEADING, TitledBorder.TOP, null, null));  	GroupLayout gl_panel_1 = new GroupLayout(panel_1);	gl_panel_1.setHorizontalGroup(	gl_panel_1.createParallelGroup(Alignment.LEADING)	.addGroup(gl_panel_1.createSequentialGroup()	.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)	.addGroup(gl_panel_1.createParallelGroup(Alignment.LEADING)	.addGroup(gl_panel_1.createSequentialGroup()	.addComponent(rdbtnNone2)	.addPreferredGap(ComponentPlacement.UNRELATED)	.addComponent(rdbtnWave2))	.addGroup(gl_panel_1.createSequentialGroup()	.addComponent(rdbtnScroll)	.addPreferredGap(ComponentPlacement.UNRELATED)	.addComponent(rdbtnShake))	.addGroup(gl_panel_1.createSequentialGroup()	.addComponent(rdbtnWave)	.addPreferredGap(ComponentPlacement.RELATED)	.addComponent(rdbtnSlide)))	.addGap(22))	);	rdbtnNone2.setSelected(true);	gl_panel_1.setVerticalGroup(	gl_panel_1.createParallelGroup(Alignment.LEADING)	.addGroup(gl_panel_1.createSequentialGroup()	.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnNone2)	.addComponent(rdbtnWave2))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnScroll)	.addComponent(rdbtnShake))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnWave)	.addComponent(rdbtnSlide))	.addContainerGap(78, Short.MAX_VALUE))	);	panel_1.setLayout(gl_panel_1);    	JButton btnAdd = new JButton("Change");    	GroupLayout gl_contentPane = new GroupLayout(contentPane);	gl_contentPane.setHorizontalGroup(	gl_contentPane.createParallelGroup(Alignment.TRAILING)	.addGroup(gl_contentPane.createSequentialGroup()	.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)	.addGroup(gl_contentPane.createSequentialGroup()	.addGap(4)	.addComponent(lblMessage)	.addPreferredGap(ComponentPlacement.RELATED)	.addComponent(txtText))	.addGroup(gl_contentPane.createSequentialGroup()	.addContainerGap()	.addComponent(panel, GroupLayout.PREFERRED_SIZE, 170, GroupLayout.PREFERRED_SIZE)	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING, false)	.addComponent(btnAdd, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)	.addComponent(btnCancel, GroupLayout.DEFAULT_SIZE, 83, Short.MAX_VALUE))	.addPreferredGap(ComponentPlacement.RELATED)	.addComponent(panel_1, GroupLayout.PREFERRED_SIZE, 158, GroupLayout.PREFERRED_SIZE)))	.addContainerGap())	);	gl_contentPane.setVerticalGroup(	gl_contentPane.createParallelGroup(Alignment.LEADING)	.addGroup(gl_contentPane.createSequentialGroup()	.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)	.addComponent(lblMessage)	.addComponent(txtText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))	.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)	.addGroup(gl_contentPane.createSequentialGroup()	.addGap(55)	.addComponent(btnAdd)	.addPreferredGap(ComponentPlacement.RELATED)	.addComponent(btnCancel))	.addGroup(gl_contentPane.createSequentialGroup()	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)	.addComponent(panel, GroupLayout.PREFERRED_SIZE, 178, GroupLayout.PREFERRED_SIZE)	.addComponent(panel_1, GroupLayout.PREFERRED_SIZE, 178, GroupLayout.PREFERRED_SIZE))))	.addGap(3))	);      	GroupLayout gl_panel = new GroupLayout(panel);	gl_panel.setHorizontalGroup(	gl_panel.createParallelGroup(Alignment.LEADING)	.addGroup(gl_panel.createSequentialGroup()	.addContainerGap()	.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)	.addGroup(gl_panel.createSequentialGroup()	.addComponent(rdbtnCyan)	.addGap(18)	.addComponent(rdbtnGlow3))	.addGroup(gl_panel.createSequentialGroup()	.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)	.addComponent(rdbtnNone)	.addComponent(rdbtnRed)	.addComponent(rdbtnWhite)	.addComponent(rdbtnGreen)	.addComponent(rdbtnPurple))	.addGap(14)	.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)	.addComponent(rdbtnGlow2)	.addComponent(rdbtnGlow1)	.addComponent(rdbtnFlash3)	.addComponent(rdbtnFlash2)	.addComponent(rdbtnFlash1))))	.addContainerGap(16, Short.MAX_VALUE))	);	rdbtnNone.setSelected(true);	gl_panel.setVerticalGroup(	gl_panel.createParallelGroup(Alignment.LEADING)	.addGroup(gl_panel.createSequentialGroup()	.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnNone)	.addComponent(rdbtnFlash1))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnRed)	.addComponent(rdbtnFlash2))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnWhite)	.addComponent(rdbtnFlash3))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnGreen)	.addComponent(rdbtnGlow1))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnPurple)	.addComponent(rdbtnGlow2))	.addPreferredGap(ComponentPlacement.RELATED)	.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)	.addComponent(rdbtnCyan)	.addComponent(rdbtnGlow3))	.addContainerGap(9, Short.MAX_VALUE))	);	panel.setLayout(gl_panel);	contentPane.setLayout(gl_contentPane);      	ButtonGroup group = new ButtonGroup();	group.add(rdbtnNone);	group.add(rdbtnRed);	group.add(rdbtnWhite);	group.add(rdbtnGreen);	group.add(rdbtnPurple);	group.add(rdbtnCyan);	group.add(rdbtnFlash1);	group.add(rdbtnFlash2);	group.add(rdbtnFlash3);	group.add(rdbtnGlow1);	group.add(rdbtnGlow2);	group.add(rdbtnGlow3);	ButtonGroup group2 = new ButtonGroup();	group2.add(rdbtnNone2);	group2.add(rdbtnScroll);	group2.add(rdbtnWave);	group2.add(rdbtnWave2);	group2.add(rdbtnShake);	group2.add(rdbtnScroll);	group2.add(rdbtnSlide);	btnAdd.addActionListener(new ActionListener() {	public void actionPerformed(ActionEvent e) {	edit();	}	});	}    	public static void edit(){	int originalindex = main.list1.getSelectedIndex();	main.list1.delItem(originalindex);	String colour = null;	String movement = null;	Boolean error = false;	if(rdbtnNone.isSelected() == true){	colour = "";	}else if(rdbtnRed.isSelected() == true){	colour = "Red:";	}else if(rdbtnWhite.isSelected() == true){	colour = "White:";	}else if(rdbtnGreen.isSelected() == true){	colour = "Green:";	}else if(rdbtnPurple.isSelected() == true){	colour = "Purple:";	}else if(rdbtnCyan.isSelected() == true){	colour = "Cyan:";	}else if(rdbtnFlash1.isSelected() == true){	colour = "Flash1:";	}else if(rdbtnFlash2.isSelected() == true){	colour = "Flash2:";	}else if(rdbtnFlash3.isSelected() == true){	colour = "Flash3:";	}else if(rdbtnGlow1.isSelected() == true){	colour = "Glow1:";	}else if(rdbtnGlow2.isSelected() == true){	colour = "Glow2:";	}else if(rdbtnGlow2.isSelected() == true){	colour = "Glow3:";	}else {	JOptionPane.showMessageDialog(null, "No colour selected!", "Error", JOptionPane.INFORMATION_MESSAGE, null);	error = true;	}  	if(rdbtnNone2.isSelected() == true){	movement = "";	}else if(rdbtnWave2.isSelected() == true){	movement = "Wave2:";	}else if(rdbtnWave.isSelected() == true){	movement = "Wave:";	}else if(rdbtnScroll.isSelected() == true){	movement = "Scroll:";	}else if(rdbtnShake.isSelected() == true){	movement = "Shake:";	}else if(rdbtnSlide.isSelected() == true){	movement = "Slide:";	}else{	JOptionPane.showMessageDialog(null, "No movement selected!", "Error", JOptionPane.INFORMATION_MESSAGE, null);	error = true;	}  	if(error == false){	main.list1.addItem(colour + movement + txtText.getText(), originalindex);	main.list1.select(originalindex);	btnCancel.doClick();	}	}     public static void setup(){	String message;	String colour;	String movement;	String original;	String temp = new String();	int count;	boolean colourbool = false;	boolean movementbool = false;  	original = main.list1.getItem(main.list1.getSelectedIndex());      	count = original.indexOf(":");	temp = original.substring(0, count);	txtText.setText(temp);	if(temp.equals("Red")){	rdbtnRed.setSelected(true);	}else if(temp == "White"){	rdbtnWhite.setSelected(true);	}else if(temp == "Green"){	rdbtnGreen.setSelected(true);	}else if(temp == "Purple"){	rdbtnPurple.setSelected(true);	}else if(temp == "Cyan"){	rdbtnCyan.setSelected(true);	}else if(temp == "Flash1"){	rdbtnFlash1.setSelected(true);	}else if(temp == "Flash2"){	rdbtnFlash2.setSelected(true);	}else if(temp == "Flash3"){	rdbtnFlash3.setSelected(true);	}else if(temp == "Glow1"){	rdbtnGlow1.setSelected(true);	}else if(temp == "Glow2"){	rdbtnGlow2.setSelected(true);	}else if(temp == "Glow3"){	rdbtnGlow3.setSelected(true);	}else if(temp == "Wave"){	rdbtnWave.setSelected(true);	}else if(temp == "Wave2"){	rdbtnWave2.setSelected(true);	}else if(temp == "Scroll"){	rdbtnScroll.setSelected(true);	}else if(temp == "Shake"){	rdbtnShake.setSelected(true);	}else if(temp == "Slide"){	rdbtnSlide.setSelected(true);	}else{	JOptionPane.showMessageDialog(null, "Didnt do anytin (like normal)");	}  	if(temp == "Wave"){	rdbtnWave.setSelected(true);	}else if(temp == "Wave2"){	rdbtnWave2.setSelected(true);	}else if(temp == "Scroll"){	rdbtnScroll.setSelected(true);	}else if(temp == "Shake"){	rdbtnShake.setSelected(true);	}else if(temp == "Slide"){	rdbtnSlide.setSelected(true);	}    	} }

Oh, nevermind. That is a rather big error that should go in a separate thread. Thanks for the help!

Would the Radiobuttons not changing

Please explain what the problem is? What is supposed to change and what is to make it change?

In the code above, I have the Radiobuttons declared as class-wide variables. For some reason, I cannot set their checked value from a sub that they weren't added to the JFrame. This has something to do with threading, I think.

Anyway, I fixed it by taking my code from setup() and adding it to the bottom of edit()

Thanks so much for your help, been stuck on these errors for a week now! You solved them all!

You should NOT use statics to get around passing references to objects.

Okay, I have no idea what that means

Remove all the static variables from your code except the one on the main method.