j_intern.java

一个十分好的java基础学习的课件

// ////////////////////////////////////////////////////////
// 
// J_Intern.java
// 

// ////////////////////////////////////////////////////////

public class J_Intern
{
  
    public static void main(String args[])
    {
        String s0= "String Literal";    // 字符串常量
        String s1= "String Literal";    // 字符串常量
        String s2= new String("String Literal"); // 这不是字符串常量
        String s3= s2.intern( );
        System.out.println("s1==s0 is " + (s1==s0));
        System.out.println("s2==s0 is " + (s2==s0));
        System.out.println("s3==s0 is " + (s3==s0));
        System.out.println("s3==s2 is " + (s3==s2));
        System.out.println("s2.intern( ) ==s0.intern( ) is " + (s2.intern( ) ==s0.intern( )));

    } // End of method: main

} // End of class: J_Intern