JDK 1.1 Source Code Directory

JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes: "C:\fyicenter\jdk-1.1.8\src".

Here is the list of Java classes of the JDK 1.1 source code:

✍: FYIcenter

java/awt/Label.java

/*
 * @(#)Label.java	1.32 01/12/10
 *
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package java.awt;

import java.awt.peer.LabelPeer;

/**
 * A <code>Label</code> object is a component for placing text in a 
 * container. A label displays a single line of read-only text.
 * The text can be changed by the application, but a user cannot edit it 
 * directly.  
 * <p>
 * For example, the code&nbsp;.&nbsp;.&nbsp;.
 * <p>
 * <hr><blockquote><pre>
 * setLayout(new FlowLayout(FlowLayout.CENTER, 10, 10)); 
 * add(new Label("Hi There!")); 
 * add(new Label("Another Label"));
 * </pre></blockquote><hr>
 * <p>
 * produces the following label:
 * <p>
 * <img src="images-awt/Label-1.gif" 
 * ALIGN=center HSPACE=10 VSPACE=7>
 *
 * @version	1.32, 12/10/01
 * @author 	Sami Shaio
 * @since       JDK1.0
 */
public class Label extends Component {

    /**
     * Indicates that the label should be left justified. 
     * @since   JDK1.0
     */
    public static final int LEFT 	= 0;

    /** 
     * Indicates that the label should be centered. 
     * @since   JDK1.0
     */
    public static final int CENTER 	= 1;

    /**
     * Indicates that the label should be right justified. 
     * @since   JDK1.0t.
     */
    public static final int RIGHT 	= 2;

    /**
     * The text of this label.
     */
    String text;
    
    /**
     * The label's alignment.  The default alignment is set
     * to be left justified.
     */
    int	   alignment = LEFT;

    private static final String base = "label";
    private static int nameCounter = 0;

    /*
     * JDK 1.1 serialVersionUID 
     */
     private static final long serialVersionUID = 3094126758329070636L;

    /**
     * Constructs an empty label.
     * @since JDK1.0
     */
    public Label() {
	this("", LEFT);
    }

    /**
     * Constructs a new label with the specified string of text, 
     * left justified.
     * @param text the string that the label presents.
     * @since JDK1.0
     */
    public Label(String text) {
        this(text, LEFT);
    }

    /**
     * Constructs a new label that presents the specified string of 
     * text with the specified alignment.
     * <p>
     * Possible values for <code>alignment</code> are <code>Label.LEFT</code>, 
     * <code>Label.RIGHT</code>, and <code>Label.CENTER</code>.
     * @param     text        the string that the label presents.
     * @param     alignment   the alignment value.
     * @since     JDK1.0
     */
    public Label(String text, int alignment) {
	this.text = text;
	setAlignment(alignment);
    }

    /**
     * Construct a name for this component.  Called by getName() when the
     * name is null.
     */
    String constructComponentName() {
        return base + nameCounter++;
    }

    /**
     * Creates the peer for this label.  The peer allows us to
     * modify the appearance of the label without changing its 
     * functionality.
     */
    public void addNotify() {
      synchronized (getTreeLock()) {
	  if (peer == null)
		peer = getToolkit().createLabel(this);
	super.addNotify();
      }
    }

    /** 
     * Gets the current alignment of this label. Possible values are
     * <code>Label.LEFT</code>, <code>Label.RIGHT</code>, and 
     * <code>Label.CENTER</code>.
     * @see        java.awt.Label#setAlignment
     * @since      JDK1.0
     */
    public int getAlignment() {
	return alignment;
    }

    /** 
     * Sets the alignment for this label to the specified alignment.
     * Possible values are <code>Label.LEFT</code>, 
     * <code>Label.RIGHT</code>, and <code>Label.CENTER</code>.
     * @param      alignment    the alignment to be set.
     * @exception  IllegalArgumentException if an improper value for 
     *                          <code>alignment</code> is given. 
     * @see        java.awt.Label#getAlignment
     * @since      JDK1.0
     */
    public synchronized void setAlignment(int alignment) {
	switch (alignment) {
	  case LEFT:
	  case CENTER:
	  case RIGHT:
	    this.alignment = alignment;
    	    LabelPeer peer = (LabelPeer)this.peer;
	    if (peer != null) {
		peer.setAlignment(alignment);
	    }
	    return;
	}
	throw new IllegalArgumentException("improper alignment: " + alignment);
    }

    /** 
     * Gets the text of this label. 
     * @return     the text of this label.
     * @see        java.awt.Label#setText
     * @since      JDK1.0
     */
    public String getText() {
	return text;
    }

    /** 
     * Sets the text for this label to the specified text.
     * @param      text the text that this label presents. 
     * @see        java.awt.Label#getText
     * @since      JDK1.0
     */
    public synchronized void setText(String text) {
	if (text != this.text && (this.text == null
				    || !this.text.equals(text))) {
	    this.text = text;
    	    LabelPeer peer = (LabelPeer)this.peer;
	    if (peer != null) {
		peer.setText(text);
	    }
	}
    }

    /**
     * Returns the parameter string representing the state of this 
     * label. This string is useful for debugging. 
     * @return     the parameter string of this label.
     * @since      JDK1.0
     */
    protected String paramString() {
	String str = ",align=";
	switch (alignment) {
	  case LEFT:   str += "left"; break;
	  case CENTER: str += "center"; break;
	  case RIGHT:  str += "right"; break;
	}
	return super.paramString() + str + ",text=" + text;
    }
}

java/awt/Label.java

 

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