相关疑难解决方法(0)

我有以下测试代码:

public class StringLiteralTest {
    static void testPrefix() {
        int i = 0;
        String prefixConcat = "a" + "b" + i;
    }

    static void testSuffix() {
        int i = 0;
        String suffixConcat = i + "c" + "d";
    }
}

生成的字节码是:

Compiled from "StringLiteralTest.java"
public class StringLiteralTest {
  public StringLiteralTest();
    Code:
       0: aload_0
       1: invokespecial #8                  // Method java/lang/Object."<init>":()V
       4: return

  static void testPrefix();
    Code:
       0: iconst_0
       1: istore_0
       2: new           #15                 // class java/lang/StringBuilder
       5: dup
       6: ldc           #17 …