Java 什么时候应该在String文字上使用String的内部方法

Java自动实习字符串文字。这意味着在许多情况下，==运算符似乎适用于

Strings

ints

由于

Interning

String

intern()

new String()

使用你的示例：

String s1 = "Rakesh";String s2 = "Rakesh";String s3 = "Rakesh".intern();String s4 = new String("Rakesh");String s5 = new String("Rakesh").intern();if ( s1 == s2 ){    System.out.println("s1 and s2 are same");  // 1.}if ( s1 == s3 ){    System.out.println("s1 and s3 are same" );  // 2.}if ( s1 == s4 ){    System.out.println("s1 and s4 are same" );  // 3.}if ( s1 == s5 ){    System.out.println("s1 and s5 are same" );  // 4.}

将返回：

s1 and s2 are sames1 and s3 are sames1 and s5 are same