Java基礎 awt Frame 窗體的大小不可調

時間 2019-11-06

標籤 java 基礎 awt frame 窗體大小可調欄目 Java 简体版

原文原文鏈接

JDK ：OpenJDK-11

OS ：CentOS 7.6.1810

IDE ：Eclipse 2019‑03

typesetting ：Markdown

code

package per.jizuiku.gui;

import java.awt.Frame;

/**
 * @author 給最苦
 * @date 2019/06/30
 * @blog www.cnblogs.com/jizuiku
 */
public class Demo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        Frame f = new Frame();

        f.setSize(400, 400);

        // 窗體的大小能夠調整嗎？ 不
        f.setResizable(false);

        f.setVisible(true);

    }

}

result

sourceCode

/**
    * Sets whether this frame is resizable by the user.
    * @param    resizable   {@code true} if this frame is resizable;
    *                       {@code false} otherwise.
    * @see      java.awt.Frame#isResizable
    */
public void setResizable(boolean resizable) {
    boolean oldResizable = this.resizable;
    boolean testvalid = false;

    synchronized (this) {
        this.resizable = resizable;
        FramePeer peer = (FramePeer)this.peer;
        if (peer != null) {
            peer.setResizable(resizable);
            testvalid = true;
        }
    }

    // On some platforms, changing the resizable state affects
    // the insets of the Frame. If we could, we'd call invalidate()
    // from the peer, but we need to guarantee that we're not holding
    // the Frame lock when we call invalidate().
    if (testvalid) {
        invalidateIfValid();
    }
    firePropertyChange("resizable", oldResizable, resizable);
}