if條件控制語句
阿新 • • 發佈:2018-10-31
1、在if括號填入boolean表示式
public class TestBoolean {
public static void main(String[] args){
int x = 100;
if( x < 200 ){
System.out.print("boolean測試");
}
}
}
2、在if括號填入boolean型別
public class TestBoolean { public static void main(String[] args){ int x = 100; if(true){ System.out.print("boolean測試"); } } }
3、邏輯運算
public static void main(String[] args){
if((10 > 5) && (19 > 6)){ //全部條件為true執行
System.out.print("&&");
}
}
public static void main(String[] args){ if((10 > 5) || (19 < 6)){ //其中一個為true執行 System.out.print("||"); } }
4、if/else語句
public static void main(String[] args){
int x = 10;
if( x < 20 ){
System.out.print("這是 if 語句");
}else{
System.out.print("這是 else 語句");
}
}
public static void main(String[] args){ int x = 10; if( x == 10 ){ System.out.print("Value of X is 10"); }else if( x == 10 ){ System.out.print("Value of X is 20"); }else if( x == 30 ){ System.out.print("Value of X is 30"); }else{ System.out.print("這是 else 語句"); } }