ex2_9.java

判断三角形

//2.9（判断三角形）
import javax.swing.JOptionPane;
public class Ex2_9{
	public static void main (String[] args) {
    double edge1,edge2,edge3;
    edge1=Double.parseDouble(JOptionPane.showInputDialog("输入第一条边："));
    edge2=Double.parseDouble(JOptionPane.showInputDialog("输入第二条边："));
    edge3=Double.parseDouble(JOptionPane.showInputDialog("输入第三条边："));
    boolean triagle= (edge1+edge2)>edge3
    	&&(edge1+edge3)>edge2
    	&&(edge2+edge3)>edge1;
    System.out.println("Can edge "+edge1+","+edge2+", and "+edge3+"form a triagle?"+triagle);
    System.exit(0);
}
}